Re: Implementing strict types

On 1 March 2011 04:40, Paul McGarry <paul@paulmcgarry.com> wrote: > I am looking at implementing something roughly equivalent to strict > typing for a part of my code. > Has anybody else had a go at such a thing? > > I have some data types which I'm implementing as classes (base types > like "int" but also more specific types like "country") and I'd like > to be able to use them as normal variables (as far as assigning and > retrieving it's value goes) with 'magic' happening inside the class > for validation and normalisation (eg accepting any ISO style country > code on assignment but standardising on alpha 2 on output). > > I am aware of the capability to override the assignment operator for a > property of an object, ie use the __set() magic method so that > ==== > $object->var='hello'; > ==== > is equivalent to: > ==== > $object->__set('var','hello'); > ==== > allowing the __set() method to do some funky stuff. > > Is there a similar capability to override the assignment operator on > the object itself, ie have: > ==== > $object='hello'; > ==== > handled by a method on the $object? > > Similarly the __toString() magic method would cover part of the > "getter" overriding, but it seems to be a special case override that > only works within specific string functions rather than a generic > getter override. > > Paul > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > There is __invoke, but that is for ... $instance() The problem is (hopefully) explained in ... $instance = 'something that needs to be passed to instance and not assigned to instance'; How do you differentiate between the two "assignments" (one to the variable and one to be processed by the instance) ? Richard. -- Richard Quadling Twitter : EE : Zend @RQuadling : e-e.com/M_248814.html : bit.ly/9O8vFY